const llvm::DenseMap<OpOrVal, absl::string_view>& GetMap() const {
    return op_or_val_to_name_;
  }

  // Returns the separator used before uniqueing suffix.
  virtual llvm::StringRef GetSuffixSeparator() { return ""; }

  virtual llvm::StringRef GetDashSeparator() { return "_"; }

 private:
  // Returns name from the location of the operation or value.
  virtual std::string GetName(OpOrVal op_or_val) = 0;

  }

  // Add increasing number (count) to end of prefix until it is determined
  // to be unique.
  auto& val = prefix_it.first->second;
  auto prefix_name = hash_value == 0 ? prefix.str() + GetSuffixSeparator().str()
                                     : prefix.str() + GetDashSeparator().str() +
                                           std::to_string(hash_value) +